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IS : 941 - 1985
(Reaffirmed 1995)
(Second Revision)
First Reprint SEPTEMBER 1999
UDC 614.847.621.61/.63
© Copyright 1986
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
Gr 3
February 1986
i iiIndian Standard
SPECIFICATION FOR BLOWER AND EXHAUSTER FOR FIRE FIGHTING
(Second Revision)
Fire Fighting Sectional Committee, BDC 22
| Chairman | Representing |
|---|---|
| Shri G. B. Menon | Gujarat Electricity Board, Vadodara |
| Members | |
| Shri A. N. Ahluwalia | The Institution of Fire Engineers (India), New Delhi |
| Shri B. R. Mehta (Alternate) | |
| Shri S. R. Bansal | Steel Authority of India Ltd (Bokaro Steel Plant), Bokaro Steel City |
| Shri B. L. Chaudhry | Oil and Natural Gas Commission, Dehra Dun |
| Shri B. K. Sippy (Alternate) | |
| Shri K. K. Das Gupta | West Bengal Fire Services, Government of West Bengal, Calcutta |
| Deputy Inspector General (RPSF) | Ministry of Railways |
| Assistant Security Officer (Fire), Northern Railway (Alternate) | |
| Shri V. P. Dewan | Ministry of Defence (DGI) |
| Lt-Col V. R. Banahati (Alternate) | |
| Shri S. K. Dheri | Municipal Corporation of Delhi (Delhi Fire Service), Delhi |
| Shri R. K. Bhardwaj (Alternate) | |
| Shri R. R. Dhobley | Bhabha Atomic Research Centre, Bombay |
| Director | Home Department (Fire Service), Government of Tamil Nadu, Madras |
| Deputy Director (Alternate) | |
| Director General of Fire Services | Home (Police) Department, Government of Andhra Pradesh, Hyderabad |
| Deputy Director Fire Services (Alternate) | |
|
© Copyright 1986 This publication is protected under the Indian Copyright Act (XIV of 1957) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act. |
| Members | Representing |
|---|---|
| Fire Adviser | Ministry of Home Affairs |
| Shri A. K. Gupta | Central Building Research Institute (CSIR), Roorkee |
| Shri J. S. Jamshedji | Steelage Industries Limited (Minimax Division), Bombay |
| Shri C. Gnanaraj (Alternate) | |
| Shri P. Khanna | Jaya Shree Textiles and Industries, Rishra |
| Shri S. N. Kundu | Fire and Safety Appliances Co, Calcutta |
| Managing Director | Avon Services (Production & Agencies) Pvt Ltd, Bombay |
| Technical Executive (Alternate) | |
| Brig S. A. Mohile | Ministry of Defence (R & D) |
| Shri A. K. Suri (Alternate) | |
| Shri M. Mukherji | Steel Authority of India Ltd (Rourkela Steel Plant), Rourkela |
| Shri C. D. Sharma (Alternate) | |
| Shri V. B. Nikam | Municipal Corporation of Greater Bombay (Bombay Fire Brigade), Bombay |
| Shri P. N. Panchal | Central Industrial Security Force (Ministry of Home Affairs), New Delhi |
| Shri P. H. Sethna | Kooverji Devshi and Co Pvt Ltd, Bombay |
| Shri N. T. Panjwani (Alternate) | |
| Shri R. C. Sharma | Directorate General of Supplies and Disposals, New Delhi |
| Shri D. S. Naresh (Alternate) | |
| Shri Chandrakant M. Shah | Zenith Fire Services, Bombay |
| Shri M. H. Shah (Alternate) | |
| Shri J. V. Shah | Newage Industries, Surendranagar (Gujarat) |
| Shri B. J. Shah (Alternate) | |
| Shri D. K. Sirkar | Synthetics and Chemicals Ltd, Bareilly |
| Shri Tarit Sur | Surex Production and Sales (P) Ltd, Calcutta |
| Shri Sushil Kumar | Directorate General of Technical Development, New Delhi |
| Shri J. N. Vakil | Tariff Advisory Committee; Bombay |
| Shri K. Ravi (Alternate) | |
| Shri S. Venkaswamy | Directorate General of Civil Aviation, New Delhi |
| Shri B. V. Wagle | Urban Development, Public Health and Housing Department, Government of Maharashtra, Bombay |
| Shri V. H. Madkaikar (Alternate) | |
| Shri G. Raman, Director (Civ Engg) | Director General, ISI (EX-officio Member) |
Secretary
Shri K. M. Mathur
Joint Director (Civ Engg), ISI
(Continued on page 9)
2Indian Standard
SPECIFICATION FOR BLOWER AND EXHAUSTER FOR FIRE FIGHTING
(Second Revision)
This Indian Standard (Second Revision) was adopted by the Indian Standards Institution on 29 June 1985, after the draft finalized by the Fire Fighting Sectional Committee had been approved by the Civil Engineering Division Council.
The purpose of blower and exhauster is to provide the supply of fresh clean air to firemen who may be working in unventilated places or to exhaust accumulation of foul air, fumes and smoke from storage tanks, ships’ holds, godowns, living rooms and the like.
This standard was first published in 1958 based on the type of equipment being imported from other countries. The first revision had been prepared to have the requirements based on the experience gained in the manufacture of this equipment in the country. This revision has been prepared so as to keep the design based on performance.
For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS : 2 - 1960*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.
This standard lays down the requirements, regarding materials construction and performance of blower and exhauster used for fire fighting.
The blower and exhauster shall consist of the following parts:
*Rules for rounding off numerical values (revised).
3Aluminium castings shall have a minimum thickness of 4 mm and aluminium sheet wherever used shall have a minimum thickness of 2.5 mm.
The material used for the various parts shall be as given in Table 1.
| Sl No. | Name of Parts | Name of Material | Conforming to |
|---|---|---|---|
| (1) | (2) | (3) | (4) |
| i) | Impeller | Aluminium | Grade 4423 of IS : 617-1975* |
| ii) | Casing | Aluminium | Grade 4423 of IS : 617-1975* |
| iii) | Suction mouth | Aluminium | Grade 4423 of IS : 617-1975* |
| iv) | Exhaust pipe | Canvas | IS : 1424-1977† |
| v) | a) Petrol engine of capacity 2.5 kW with 3 litre petrol tank; or | — | IS : 7347-1974‡ |
| b) Lightweight diesel engine of capacity 3.23 kW | — | IS 10001 : 1981¶ | |
| vi) | Frame with lifting handles | MS pipe | IS : 1239 (Part 1)-1979§ |
| vii) | Wire fabric steel | Steel | IS : 4948-1974∥ |
|
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Impeller and engine shall be mounted together and the total weight of the unit with fuel shall not exceed 60 kg. Runner shall be of the overhung type to mount correctly and securely on the extension of the engine shaft. The details shall be as given in Fig. 1.
The blower shall be tested accordingly to method given in 5.1.1 to 5.1.3, after removing the guard. The blower shall be capable of discharging safely and continuously 30 m3/minute of free air.
4
Fig. 1 Details of Blower and Exhauster
5To the inlet side of the blower attach a cylindrical airway of diameter D not less than 1.5d where d is the diameter of orifice in which the impeller rotates (see Fig. 2A). To the inlet side of the airway shall be fitted a conical mouthpiece of length D/4 having an included angle of 60 degrees converging towards the blower, and a radial flange at its inlet end of width D/25. The total length of the test duct including the conical mouthpiece shall not be less than 2D.
Fig. 2A Round Testing Duct for Propeller Fans
The average air velocity shall be determined by readings of a vane anemometer from measurements across a section D from the fan end of the cylindrical airway.
For the air delivery test, the cylindrical airway shall be considered to be divided into a number of equal square areas by lines parallel to the diameter D as shown in Fig. 2B. Measurements shall be taken with the centre of the anemometer vane wheel at the centre of each area, as shown in the Fig. 2B. The number of areas shall be determined by the ratio of D to the diameter of the ring surrounding the anemometer vanes, the relationship being shown in the table under Fig. 2B.
Blower and exhauster shall be run continuously for 2 hours It shall remain stable and shall not move from its place by more than 30 cm. All the components shall be checked and there shall not be any looseness.
All parts shall be of good finish, clear of burrs and sharp edges. All casting shall be clean and sound and shall be free from plugging, welding or repair of any defects.
6
Fig. 2B Methods of Dividing the Area of Airway
Blower and exhauster except engine shall have two coats of paint after one coat of red oxide primer. The shade of paint for stand shall be black for body, fire red conforming to Shade No. 536 of IS : 5 - 1978*. Paint used shall be in accordance with IS : 2932 - 1974†.
*Specification for colours for ready mixed paints and enamels (third revision).
†Specification for enamel, synthetic exterior (a) under coating, (b) finishing (first revision).
7Each blower and exhauster shall be clearly and permanently marked with the following information:
The product may also be marked with Standard mark.
The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The details of conditions under which the licence for the use of Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards.
Each equipment shall be checked for the requirements given in this standard.
8(Continued from page 2)
Fire Fighting Units Subcommittee, BDC 22 : 3
Convener
Shri P. N. Ghosh
In personal capacity (J-1916, Chittaranjan Park, New Delhi)
| Members | Representing |
|---|---|
| Shri Mahesh C. Agrawal | Brijbasi Udyog, Mathura |
| Shri P. S. Banerjee (Alternate) | |
| Shri A. Chattopadhyay | The Institution of Fire Engineers (India), New Delhi |
| Shri K. K. Dasgupta | West Bengal Fire Services, Calcutta |
| Shri V. P. Dewan | Ministry of Defence (DGI) |
| Lt-Col V. R. Banahati (Alternate) | |
| Shri S. K. Dheri | Municipal Corporation of Delhi (Delhi Fire Service), Delhi |
| Shri R. K. Bhardwaj (Alternate) | |
| Fire Adviser | Ministry of Home Affairs |
| Shri S. A. Mohile | Ministry of Defence (R & D) |
| Shri A. K. Suri (Alternate) | |
| Shri V. B. Nikam | Municipal Corporation of Greater Bombay (Bombay Fire Brigade), Bombay |
| Shri H. M. Sabadra | Reliable (Fire Protection) Industries, Bombay |
| Shri K. K. Sawhney | Air Foam Industries Pvt Ltd, New Delhi |
| Shri R. Mehta (Alternate) | |
| Shri P. H. Sethna | Kooverji Devshi & Co (P) Ltd, Bombay |
| Shri N. T. Panjwani (Alternate) | |
| Shri D. K. Sirkar | Synthetics and Chemicals Ltd, Bareilly |
| Shri S. Venkaswamy | Directorate General of Civil Aviation, New Delhi |
| Shri B. V. Wagle | Urban Development, Public Health and Housing Department, Government of, Maharashtra, Bombay |
| Shri V. H. Madkaikar (Alternate) | |
Panel for Blowers and Exhauster, BDC 22 : 3/P-1
| Shri S. P. Bindra | Industrial Safety Engineers, New Delhi |